CN113218099A - Gas treatment method and system for heat recovery or defrosting by using refrigerant - Google Patents
Gas treatment method and system for heat recovery or defrosting by using refrigerant Download PDFInfo
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- CN113218099A CN113218099A CN202110357532.0A CN202110357532A CN113218099A CN 113218099 A CN113218099 A CN 113218099A CN 202110357532 A CN202110357532 A CN 202110357532A CN 113218099 A CN113218099 A CN 113218099A
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 143
- 238000011084 recovery Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000010257 thawing Methods 0.000 title claims abstract description 16
- 239000012530 fluid Substances 0.000 claims abstract description 64
- 238000007791 dehumidification Methods 0.000 claims abstract description 28
- 230000006835 compression Effects 0.000 claims abstract description 26
- 238000007906 compression Methods 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 238000001704 evaporation Methods 0.000 claims abstract description 12
- 230000008020 evaporation Effects 0.000 claims abstract description 12
- 238000005057 refrigeration Methods 0.000 claims description 28
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000004781 supercooling Methods 0.000 abstract description 4
- 238000001035 drying Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 230000008929 regeneration Effects 0.000 description 6
- 238000011069 regeneration method Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Gases (AREA)
Abstract
The invention provides a gas treatment method for heat recovery or defrosting by using a refrigerant, which recovers the cold quantity of cooled air by supercooling a high-pressure refrigerant hot fluid, and realizes the alternate defrosting of two heat exchangers by refrigerant reversing, thereby being capable of realizing the whole dehumidification process without stopping. Compared with air/air backheating, the latter only pre-cools the air, when a multi-stage refrigerant cooling and dehumidifying process is adopted, the air pre-cooling only reduces the load of a refrigerant compression circulating system with high evaporation temperature, and does not reduce the circulating load of a refrigerant compression system with low evaporation temperature, and the cold quantity of the air after being cooled by supercooling the high-pressure refrigerant hot fluid can increase the cold quantity and COP of the refrigerant compression system with low evaporation temperature. The invention also provides a gas treatment system for heat recovery or defrosting by using the refrigerant, and the system has the advantages of simplicity, reliability, small volume, low cost, high energy efficiency and the like, and can be widely applied to various dehumidifiers, water making machines, drying machines and the like.
Description
Technical Field
The invention relates to a dehumidification refrigeration process and system for backheating or defrosting by utilizing refrigerant circulation, in particular to a gas treatment method and system for heat recovery or defrosting by utilizing a refrigerant.
Background
The refrigeration and dehumidification processes for air treatment, water production and drying usually need a heat regeneration process to obtain required dry hot air and recover the cold quantity of the cooled air. While increasing the resistance of the gas. In addition, frost is generated in the dehumidification process, and the dehumidification is interrupted.
Disclosure of Invention
The invention aims to provide a gas treatment method and a gas treatment system for heat recovery or defrosting by using a refrigerant, wherein the heat recovery process of refrigerant circulation is utilized, only finned tube heat exchangers are needed to be added, the structure of the finned tube heat exchangers is the same as that of a first heat exchanger, namely, the number of rows of the first heat exchanger is increased, and therefore, the volume is basically not increased or is limited.
The technical scheme adopted by the invention is as follows:
a gas treatment method for heat recovery or defrosting by using a refrigerant is characterized in that the gas exchanges heat with a first heat exchanger and a second heat exchanger in sequence to realize refrigeration or refrigeration dehumidification of the gas. The first heat exchanger and the second heat exchanger provide cold or heat through refrigerant circulation. The refrigerant cycle specifically comprises:
high-pressure refrigerant hot gas compressed by the compressor enters the condenser to be condensed into high-pressure refrigerant hot fluid, the high-pressure refrigerant hot fluid enters the second heat exchanger to exchange heat with gas to be cooled, the cooled high-pressure refrigerant hot fluid enters the first heat exchanger through the throttling mechanism to exchange heat with the gas to be evaporated, and refrigerant gas flowing out of the first heat exchanger enters the compressor again to be compressed to complete circulation. At the moment, the gas is cooled by the first heat exchanger to realize refrigeration or refrigeration dehumidification, and then is heated by the second heat exchanger to realize heat recovery.
Or the high-pressure refrigerant hot gas compressed by the compressor enters the condenser to be condensed into high-pressure refrigerant hot fluid, the high-pressure refrigerant hot fluid enters the first heat exchanger to defrost the first heat exchanger, the refrigerant flowing out of the first heat exchanger enters the second heat exchanger through the throttling mechanism to exchange heat with gas to be heated, and the heated refrigerant enters the compressor to be compressed to complete circulation. At the moment, the gas passes through the first heat exchanger and is cooled by the second heat exchanger to realize gas refrigeration. And the first heat exchanger and the second heat exchanger are alternately defrosted by reversing the refrigerant.
Further, the gas exchanges heat with the heat exchange area of part or all of the condensers after exchanging heat with the second heat exchanger, and the gas is further heated and heat recovered.
And further, multi-stage refrigeration and dehumidification and multi-stage heat recovery are carried out on the gas by utilizing the multiple groups of the first heat exchanger and the second heat exchanger. The air passes through each first heat exchanger in turn to be cooled and dehumidified in multiple stages according to the evaporation temperature from low to high, and then passes through each second heat exchanger in turn according to the evaporation temperature from low to high, so that the cold quantity is recovered in multiple stages.
Further, the method also comprises a pre-cooling step, specifically:
and the gas exchanges heat with a gas cooler, a first heat exchanger, a gas heater and a second heat exchanger in sequence, so as to realize gas precooling, refrigeration or refrigeration dehumidification and heat recovery respectively. Wherein the refrigerant cycle is as follows: high-pressure refrigerant hot gas compressed by a compressor enters a condenser to be condensed into high-pressure refrigerant hot fluid, the high-pressure refrigerant hot fluid enters a gas heater to be cooled by dehumidified gas, the cooled high-pressure refrigerant hot fluid enters a gas cooler to be heated by the gas to be dehumidified, the heated high-pressure refrigerant hot fluid enters a second heat exchanger to be cooled by gas heat exchange, the cooled high-pressure refrigerant hot fluid enters a first heat exchanger through a throttling mechanism to be evaporated by the gas heat exchange, and refrigerant gas flowing out of the first heat exchanger enters the compressor to be compressed to complete circulation.
The invention also provides a gas treatment system for heat recovery by using the refrigerant, which comprises a refrigerant compression system and a box body; the refrigerant compression system is a refrigerant circulation loop formed by sequentially connecting a compressor inlet, a condenser hot fluid channel interface, a second heat exchanger hot fluid channel interface, a throttling mechanism, a first heat exchanger cold fluid channel interface and a compressor outlet through refrigerant pipelines. The box is equipped with gas inlet and outlet, and first heat exchanger and second heat exchanger are arranged in the box, and gas passes through first heat exchanger and second heat exchanger in proper order.
Furthermore, all or part of the heat exchange area of the condenser is arranged in the box body and is positioned behind the second heat exchanger, and the gas passes through the second heat exchanger and then passes through the condenser.
The system is further provided with a gas cooler and a gas heater, wherein a compressor inlet, a condenser hot fluid channel interface, a gas heater hot fluid channel interface, a gas cooler cold fluid channel interface, a second heat exchanger hot fluid channel interface, a throttling mechanism, a first heat exchanger cold fluid channel interface and a compressor outlet are sequentially connected through a refrigerant pipeline to form a refrigerant circulation loop as a refrigerant compression system, the gas cooler, the first heat exchanger, the gas heater and the second heat exchanger are arranged in the box body, gas is precooled through the gas cooler, then is cooled and dehumidified through the first heat exchanger, and is heated through the gas heater and the second heat exchanger. The gas passes through the gas heater and the second heat exchanger in parallel or in series.
Furthermore, the system comprises two refrigerant compression systems, the first heat exchangers and the second heat exchangers of the two systems are arranged in the box body, the first heat exchangers are located at the upstream of the second heat exchangers, the two first heat exchangers are sequentially arranged, gas sequentially passes through the two first heat exchangers, the two second heat exchangers are sequentially or side by side arranged, and the gas sequentially passes through the two second heat exchangers or parallelly passes through the two second heat exchangers.
The invention also provides a gas treatment system for defrosting by utilizing the refrigerant, which comprises a refrigerant compression system and a box body; the refrigerant compression system comprises a compressor, a four-way valve, a condenser, a first heat exchanger, a throttling mechanism and a second heat exchanger. The four interfaces of the four-way valve are respectively connected with a refrigerant channel interface of the first heat exchanger, a refrigerant channel interface of the second heat exchanger, an inlet of the compressor and a hot fluid outlet of the condenser; the other interface of the refrigerant channel of the first heat exchanger is connected with one end of a throttling mechanism, the other end of the throttling mechanism is connected with the other interface of the refrigerant channel of the second heat exchanger, and an outlet of the compressor is connected with a hot fluid inlet of the condenser.
The box is equipped with gas inlet and outlet, and first heat exchanger and second heat exchanger are arranged in the box, and gas passes through first heat exchanger and second heat exchanger in proper order. The alternating defrosting of the first heat exchanger and the second heat exchanger is realized by switching the sequence of the refrigerant passing through the first heat exchanger and the second heat exchanger through the four-way valve.
Further, the system can also realize heat recovery, specifically: high-pressure refrigerant hot gas compressed by the compressor enters the condenser to be condensed into high-pressure refrigerant hot fluid, the high-pressure refrigerant hot fluid enters the second heat exchanger to exchange heat with gas to be cooled, the cooled high-pressure refrigerant hot fluid enters the first heat exchanger through the throttling mechanism to exchange heat with the gas to be evaporated, and refrigerant gas flowing out of the first heat exchanger enters the compressor again to be compressed to complete circulation. At the moment, the gas is cooled by the first heat exchanger to realize refrigeration or refrigeration dehumidification, and then is heated by the second heat exchanger to realize heat recovery.
The invention adopts high-pressure refrigerant hot fluid to recover the cold quantity of the cooled air by supercooling, compared with air/air heat return, the latter only performs precooling on the air, when a multistage refrigerant cooling and dehumidifying process is adopted, the air precooling only reduces the load of a refrigerant compression circulating system with high evaporation temperature and does not reduce the circulating load of a refrigerant compression system with low evaporation temperature, but the cold quantity of the cooled air recovered by supercooling the high-pressure refrigerant hot fluid can increase the cold quantity and COP of the refrigerant compression system with low evaporation temperature, and the cold quantity and COP of the refrigerant compression system with low evaporation temperature formed by the same compressor are lower than those of the refrigerant compression system with high evaporation temperature, so that the cold quantity and COP of the low-temperature refrigerant compression system are improved, and the invention has more significance. In addition, the invention can realize non-stop dehumidification through the alternative defrosting of the two heat exchangers.
The invention has the advantages of simple and reliable system, small volume, low cost, high energy efficiency and the like, and can be widely applied to various dehumidifiers, water making machines, drying machines and the like.
Drawings
FIG. 1 is a conventional cooling dehumidification system with an air/air regenerator;
FIG. 2 is a conventional dehumidification system;
FIG. 3 is a schematic view of one of the cooling and dehumidifying systems using refrigerant circulation for heat regeneration;
FIG. 4 is a second cooling and dehumidifying system using refrigerant circulation to perform heat regeneration;
FIG. 5 is a third cooling and dehumidifying system using refrigerant circulation to perform heat regeneration;
FIG. 6 is a cooling dehumidification system cycle one with a four-way valve;
FIG. 7 is a cooling dehumidification system cycle two with a four-way valve;
FIG. 8 illustrates a cooling and dehumidification system including multiple refrigerant compression cycles;
FIG. 9 is a conventional multi-stage dehumidification system;
FIG. 10 is one of the cooling dehumidification systems with pre-cooling;
FIG. 11 is a second cooling dehumidification system with pre-cooling;
in the figure, 1-5 represent different state points of the gas.
Detailed Description
Fig. 1 is a conventional cooling and dehumidifying system with air/air heat regeneration, and fig. 2 is a conventional cooling and dehumidifying system, in which an evaporator is used to cool and dehumidify inlet air, and a heat regenerator is used to exchange heat between inlet air and outlet air. As shown in the figure, the system is large in volume and the wind flow system is complex.
Fig. 3 shows a cooling and dehumidifying system with a second heat exchanger according to the present invention, wherein the system 100 includes a first heat exchanger 101, a throttling mechanism 102, a condenser 103, a compressor 104, a second heat exchanger 105, a refrigerant pipeline 106, a tank body 107, etc., wherein an outlet of the compressor 104, a hot fluid channel interface of the condenser 103, a hot fluid channel interface of the second heat exchanger 105, the throttling mechanism 102, a cold fluid channel interface of the first heat exchanger 101, and an inlet of the compressor 104 are sequentially connected through the refrigerant pipeline to form a refrigerant circulation loop as a refrigerant compression system, the first heat exchanger 101 and the second heat exchanger 105 are disposed in the tank body 107, two ends of the tank body 107 are provided with gas inlets and outlets, and gas sequentially passes through the first heat exchanger 101 and the second heat exchanger 105.
The working process of the system is as follows: high-pressure refrigerant hot gas compressed by the compressor enters the condenser to be condensed into high-pressure refrigerant hot fluid, the high-pressure refrigerant hot fluid enters the second heat exchanger to exchange heat with gas to be cooled, the cooled high-pressure refrigerant hot fluid enters the first heat exchanger through the throttling mechanism to exchange heat with the gas to be evaporated, and refrigerant gas flowing out of the first heat exchanger enters the compressor again to be compressed to complete circulation. At the moment, the gas is cooled by the first heat exchanger to realize refrigeration or refrigeration dehumidification, and then is heated by the second heat exchanger to realize heat recovery.
The system 100A of fig. 4 also houses a condenser 103, and the gas passes through the condenser 103 after passing through a second heat exchanger 105.
The system 100B of fig. 5 divides the condenser into two parts, one part 103A inside the tank and the other part 103B outside the tank.
In fig. 6 and fig. 7, a four-way valve 201 is added to the system 200 of fig. 7 on the basis of the system 100, four ports of the four-way valve are respectively connected to a refrigerant outlet of the first heat exchanger 101, a refrigerant inlet of the second heat exchanger 105, an inlet of the compressor 104 and a refrigerant outlet of the condenser 103, the four-way valve 201 is reversed, fluid flow directions of the first heat exchanger 101 and the second heat exchanger 105 are interchanged, and the throttling mechanism 102 is disposed on a refrigerant pipeline connecting the first heat exchanger 101 and the second heat exchanger 105.
The first heat exchanger 101 and the second heat exchanger 105 are interchanged through the function of the four-way reversing valve, fig. 7, when the first heat exchanger 101 defrosts, the first heat exchanger 101 plays a role of a subcooler to precool gas, the first heat exchanger 101 defrosts, the second heat exchanger 105 plays a role of an evaporator to cool and dehumidify gas, but has no heat regeneration function, and the dehumidification and refrigeration process has no heat recovery. The specific process is as follows: high-pressure refrigerant hot gas compressed by the compressor enters the condenser to be condensed into high-pressure refrigerant hot fluid, the high-pressure refrigerant hot fluid enters the first heat exchanger to defrost the first heat exchanger, refrigerant flowing out of the first heat exchanger enters the second heat exchanger through the throttling mechanism to exchange heat with gas to be heated, and the heated refrigerant enters the compressor to be compressed to complete circulation. At the moment, the gas passes through the first heat exchanger and is cooled by the second heat exchanger to realize gas refrigeration. After defrosting is completed, the four-way reversing valve reverses to enable the first heat exchanger 101 and the second heat exchanger 105 to work normally, and heat is recovered through the second heat exchanger 105 in the dehumidification and refrigeration process, namely, as shown in fig. 6. And the first heat exchanger and the second heat exchanger are alternately defrosted by reversing the refrigerant.
Fig. 8 shows a system 300 including two refrigerant compression systems, where the refrigerant compression system a is formed by sequentially connecting a first heat exchanger 311, a first throttling mechanism 312, a second heat exchanger 315, a first condenser 313 and a first compressor 314 through refrigerant pipes, the refrigerant compression system B is formed by sequentially connecting a third heat exchanger 321, a second throttling mechanism, a fourth heat exchanger 325, a second condenser and a second compressor through refrigerant pipes, the second throttling mechanism, the second condenser, the second compressor and their connection are not shown in the figure, the third heat exchanger 321, the first heat exchanger 311 and the second heat exchanger 315 and the fourth heat exchanger 325 are sequentially disposed in a box 301, and gas sequentially passes through the third heat exchanger 321, the first heat exchanger 311 and the second heat exchanger 315 and the fourth heat exchanger 325 to perform two-stage refrigeration and heat recovery.
FIG. 9 is a conventional system with multi-stage dehumidification.
The system 400 of fig. 10 and the system 400A of fig. 11 are based on the system 100, and a gas cooler 406B and a gas heater 406A are added in the box body, and the gas cooler 406B is arranged in front of the first heat exchanger 401, and the gas heater 406A is arranged behind the first heat exchanger 401. The outlet of the compressor 404, the hot fluid channel of the condenser 403, the cold fluid channel of the gas heater 406A, the hot fluid channel of the gas cooler 406B, the hot fluid channel of the second heat exchanger 405, the throttling mechanism 402 and the cold fluid channel of the first heat exchanger 401 are connected in sequence through refrigerant pipelines to form a refrigerant circulation loop. The gas heater 406A and the first heat exchanger 401 constitute an air regenerative system, and the gas is pre-cooled by passing through the gas cooler 406B, dehumidified and cooled by passing through the first heat exchanger 401, and heated by passing through the gas heater 406A and the second heat exchanger 405. In fig. 11, the gas passes through the gas heater 406A and the second heat exchanger 405 in parallel, and in fig. 10, the gas passes through the refrigerant heater 406A and the second heat exchanger 405 in series.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should all embodiments be exhaustive. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (10)
1. The gas treatment method for heat recovery or defrosting by using the refrigerant is characterized in that the gas exchanges heat with a first heat exchanger and a second heat exchanger in sequence to realize refrigeration or refrigeration dehumidification of the gas. The first heat exchanger and the second heat exchanger provide cold or heat through refrigerant circulation. The refrigerant cycle specifically comprises:
high-pressure refrigerant hot gas compressed by the compressor enters the condenser to be condensed into high-pressure refrigerant hot fluid, the high-pressure refrigerant hot fluid enters the second heat exchanger to exchange heat with gas to be cooled, the cooled high-pressure refrigerant hot fluid enters the first heat exchanger through the throttling mechanism to exchange heat with the gas to be evaporated, and refrigerant gas flowing out of the first heat exchanger enters the compressor again to be compressed to complete circulation. At the moment, the gas is cooled by the first heat exchanger to realize refrigeration or refrigeration dehumidification, and then is heated by the second heat exchanger to realize heat recovery.
Or the high-pressure refrigerant hot gas compressed by the compressor enters the condenser to be condensed into high-pressure refrigerant hot fluid, the high-pressure refrigerant hot fluid enters the first heat exchanger to defrost the first heat exchanger, the refrigerant flowing out of the first heat exchanger enters the second heat exchanger through the throttling mechanism to exchange heat with gas to be heated, and the heated refrigerant enters the compressor to be compressed to complete circulation. At the moment, the gas passes through the first heat exchanger and is cooled by the second heat exchanger to realize gas refrigeration. And the first heat exchanger and the second heat exchanger are alternately defrosted by reversing the refrigerant.
2. The gas treatment method according to claim 1, wherein the gas is subjected to heat exchange with the heat exchange area of part or all of the condenser after being subjected to heat exchange with the second heat exchanger, and the gas is subjected to further temperature rise and heat recovery.
3. The gas treatment process according to claim 1, wherein the gas is subjected to multistage refrigeration dehumidification and multistage heat recovery using a plurality of sets of the first heat exchanger and the second heat exchanger. The air passes through each first heat exchanger in turn to be cooled and dehumidified in multiple stages according to the evaporation temperature from low to high, and then passes through each second heat exchanger in turn according to the evaporation temperature from low to high, so that the cold quantity is recovered in multiple stages.
4. The gas treatment method according to claim 1, further comprising a pre-cooling step, in particular:
and the gas exchanges heat with a gas cooler, a first heat exchanger, a gas heater and a second heat exchanger in sequence, so as to realize gas precooling, refrigeration or refrigeration dehumidification and heat recovery respectively. Wherein the refrigerant cycle is as follows: high-pressure refrigerant hot gas compressed by a compressor enters a condenser to be condensed into high-pressure refrigerant hot fluid, the high-pressure refrigerant hot fluid enters a gas heater to be cooled by dehumidified gas, the cooled high-pressure refrigerant hot fluid enters a gas cooler to be heated by the gas to be dehumidified, the heated high-pressure refrigerant hot fluid enters a second heat exchanger to be cooled by gas heat exchange, the cooled high-pressure refrigerant hot fluid enters a first heat exchanger through a throttling mechanism to be evaporated by the gas heat exchange, and refrigerant gas flowing out of the first heat exchanger enters the compressor to be compressed to complete circulation.
5. A gas processing system for heat recovery by using a refrigerant is characterized by comprising a refrigerant compression system and a box body; the refrigerant compression system is a refrigerant circulation loop formed by sequentially connecting a compressor inlet, a condenser hot fluid channel interface, a second heat exchanger hot fluid channel interface, a throttling mechanism, a first heat exchanger cold fluid channel interface and a compressor outlet through refrigerant pipelines. The box is equipped with gas inlet and outlet, and first heat exchanger and second heat exchanger are arranged in the box, and gas passes through first heat exchanger and second heat exchanger in proper order.
6. The system of claim 5, wherein all or a portion of the heat exchange area of the condenser is disposed in the housing and behind the second heat exchanger, and the gas passes through the second heat exchanger and then the condenser.
7. The system of claim 5, further comprising a gas cooler and a gas heater, wherein the compressor inlet, the condenser hot fluid channel interface, the gas heater hot fluid channel interface, the gas cooler cold fluid channel interface, the second heat exchanger hot fluid channel interface, the throttling mechanism, the first heat exchanger cold fluid channel interface, and the compressor outlet are sequentially connected through a refrigerant pipeline to form a refrigerant circulation loop as a refrigerant compression system, the gas cooler, the first heat exchanger, the gas heater, and the second heat exchanger are disposed in the box, and the gas is pre-cooled by the gas cooler, then cooled and dehumidified by the first heat exchanger, and then heated by the gas heater and the second heat exchanger. The gas passes through the gas heater and the second heat exchanger in parallel or in series.
8. The system as claimed in claim 5, wherein the system comprises two refrigerant compression systems, the first heat exchangers and the second heat exchangers of the two systems are arranged in the box body, the first heat exchangers are positioned at the upstream of the second heat exchangers, the two first heat exchangers are arranged in sequence, the gas sequentially passes through the two first heat exchangers, the two second heat exchangers are arranged in sequence or side by side, and the gas sequentially passes through the two second heat exchangers or parallelly passes through the two second heat exchangers.
9. A gas treatment system for defrosting by using a refrigerant is characterized by comprising a refrigerant compression system and a box body; the refrigerant compression system comprises a compressor, a four-way valve, a condenser, a first heat exchanger, a throttling mechanism and a second heat exchanger. The four interfaces of the four-way valve are respectively connected with a refrigerant channel interface of the first heat exchanger, a refrigerant channel interface of the second heat exchanger, an inlet of the compressor and a hot fluid outlet of the condenser; the other interface of the refrigerant channel of the first heat exchanger is connected with one end of a throttling mechanism, the other end of the throttling mechanism is connected with the other interface of the refrigerant channel of the second heat exchanger, and an outlet of the compressor is connected with a hot fluid inlet of the condenser.
The box is equipped with gas inlet and outlet, and first heat exchanger and second heat exchanger are arranged in the box, and gas passes through first heat exchanger and second heat exchanger in proper order. The alternating defrosting of the first heat exchanger and the second heat exchanger is realized by switching the sequence of the refrigerant passing through the first heat exchanger and the second heat exchanger through the four-way valve.
10. Gas treatment system according to claim 9, characterized in that said system also enables heat recovery, in particular: high-pressure refrigerant hot gas compressed by the compressor enters the condenser to be condensed into high-pressure refrigerant hot fluid, the high-pressure refrigerant hot fluid enters the second heat exchanger to exchange heat with gas to be cooled, the cooled high-pressure refrigerant hot fluid enters the first heat exchanger through the throttling mechanism to exchange heat with the gas to be evaporated, and refrigerant gas flowing out of the first heat exchanger enters the compressor again to be compressed to complete circulation. At the moment, the gas is cooled by the first heat exchanger to realize refrigeration or refrigeration dehumidification, and then is heated by the second heat exchanger to realize heat recovery.
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| CN202110357532.0A CN113218099A (en) | 2021-04-01 | 2021-04-01 | Gas treatment method and system for heat recovery or defrosting by using refrigerant |
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| CN202110357532.0A CN113218099A (en) | 2021-04-01 | 2021-04-01 | Gas treatment method and system for heat recovery or defrosting by using refrigerant |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH649371A5 (en) * | 1979-11-17 | 1985-05-15 | Arnold Mueller | Air-conditioning device |
| CN101788206A (en) * | 2009-07-03 | 2010-07-28 | 曾华文 | Outdoor double heat exchanger defrosting low-temperature heating system |
| JPWO2014167660A1 (en) * | 2013-04-10 | 2017-02-16 | 三菱電機株式会社 | Dehumidifier |
| CN108800668A (en) * | 2018-08-13 | 2018-11-13 | 沈珂 | A kind of the cooling heat exchange device and its control method of energy saving dehumidifying |
| CN110402354A (en) * | 2017-03-16 | 2019-11-01 | 瑟马-斯多有限责任公司 | Dehumidifier with auxiliary evaporator and condenser coil |
-
2021
- 2021-04-01 CN CN202110357532.0A patent/CN113218099A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH649371A5 (en) * | 1979-11-17 | 1985-05-15 | Arnold Mueller | Air-conditioning device |
| CN101788206A (en) * | 2009-07-03 | 2010-07-28 | 曾华文 | Outdoor double heat exchanger defrosting low-temperature heating system |
| JPWO2014167660A1 (en) * | 2013-04-10 | 2017-02-16 | 三菱電機株式会社 | Dehumidifier |
| CN110402354A (en) * | 2017-03-16 | 2019-11-01 | 瑟马-斯多有限责任公司 | Dehumidifier with auxiliary evaporator and condenser coil |
| CN108800668A (en) * | 2018-08-13 | 2018-11-13 | 沈珂 | A kind of the cooling heat exchange device and its control method of energy saving dehumidifying |
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Application publication date: 20210806 |
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